[m-rev.] for review: support optional package version information

[Zoltan Somogyi]

On 2023-09-09 14:19 +10:00 AEST, "Julien Fischer" <jfischer at opturion.com> wrote:
> 
> On Sat, 9 Sep 2023, Zoltan Somogyi wrote:
> 
>> On 2023-09-09 00:43 +10:00 AEST, "Julien Fischer" <jfischer at opturion.com> wrote:
>>> library/library.m:
>>>     Add version/3, which returns the package version string in addition
>>>     to the version and fullarch strings.
>>
>> I have a slight preference for separate predicates (or functions)
>> returning the Mercury version, the package version, and the fullarch,
>> but I can see that there is no point in switching to that now.
>> However, I think it would be better to add any NEW info, such as the
>> package version, as something you can get on its own.
> 
> Ok, I've removed version/3 and added the function package_version/0.
> I suggest we add the following functions as well:
> 
>   :- func mercury_version = string. % Returning MR_VERSION
>   :- func architecture  = string.   % Return MR_FULLARCH

Yes, that's what I had in mind.

> (We can deprecated version/2 eventually.)

We can, but I don't see much point. The main impact of deleting
obsolete functions/predicates is to reduce the compile time of
other modules that import this one, and in this case, such modules
will be few and far between.

Zoltan.